Screw conveyors
Robust and low-maintenance conveyor technology
Screw conveyors are known for their robust construction and low maintenance requirements. They have proven themselves under the most extreme operating conditions and offer numerous advantages for various industrial applications. This article provides a comprehensive overview of the properties, technology, designs and special versions of screw
conveyors.
Advantages of screw conveyors
Screw conveyors offer a variety of advantages that make them a preferred choice in many industrial applications.
Die wichtigsten Vorteile im Überblick
The most important advantages at a glance
- Completely enclosed housing:
Protects the conveyed material and the environment from dust and contamination - High operational reliability:
Suitable for 24/7 operation under harsh conditions - Explosion-proof applications:
Suitable for potentially explosive atmospheres thanks to low conveying Speed - Low maintenance:
High-quality materials reduce the need for maintenance and repairs - Gentle product handling:
Minimises damage to the conveyed material
The technology of screw conveyors
Screw conveyors are technically mature and can be optimally adapted to the respective application. The technology comprises various components that are crucial for efficient operation.
Gehäuse
Housing
The housing of a screw conveyor can be designed to be dust-proof, oil-tight or gas-tight, depending on requirements. It is made of painted or galvanised mild steel or stainless steel.
Trogvarianten
Housing variants
Depending on the application, the screw conveyor can be mounted in a folded U-trough with a cover or in a closed pipe.
Antriebskonzepte
Drive concepts
Die Antriebskonzepte für Schneckenförderer sind vielfältig und können an die spezifischen Anforderungen angepasst werden:
- Direct drive:
With bevel gear or flat gear Motor - Spur gear motor and coupling
Designs of screw conveyors
Screw conveyors are divided into two main designs, each of which is suitable for different conveying directions and applications.
Trogschneckenförderer (TSF)
Der Einsatz moderner CAD, FEM und DEM Software ermöglicht uns eine passgenauen Planung und die individuelle Umsetzung von Spezialanforderungen, wie zum Beispiel eine optimale Linienführung auf engstem Raum. In modernen Produktionsstätten erfolgt dann die passgenaue Umsetzung, die eine reibungslose Montage gewährleistet.
Trough screw conveyors (TSF)
TSFs are designed for horizontal or slightly ascending conveying directions and offer the following features:
- Conveying direction: Horizontal or slightly inclined (up to approx. 20°)
- Screw diameter: Up to 1,250 mm
- Conveying weight: Up to max. 500 t/h
- Conveying volume: Up to max. 1,000 m³/h
Rohrschneckenförderer (RSF)
Der Einsatz moderner CAD, FEM und DEM Software ermöglicht uns eine passgenauen Planung und die individuelle Umsetzung von Spezialanforderungen, wie zum Beispiel eine optimale Linienführung auf engstem Raum. In modernen Produktionsstätten erfolgt dann die passgenaue Umsetzung, die eine reibungslose Montage gewährleistet.
Tubular screw conveyors (RSF)
RSFs are suitable for steeper conveying directions and are particularly tight:
- Conveying direction: Horizontal or slightly inclined (up to approx. 30°)
- Screw diameter: Up to 1,250 mm
- Conveying capacity: Up to max. 500 t/h
- Conveying volume: Up to max. 1,000 m³/h
Special designs for screw conveyors
Various special designs and accessories are available for specific applications and individual requirements.
Explosionsgeschützte Geräteausführung
Explosion-proof device design
In accordance with EC Directive 94/9/EC (ATEX), explosion-proof device designs are available for various zones:
- Zone 0/20: frequent gas/dust explosion atmosphere
- Zone 1/21: occasional gas/dust explosion atmosphere
- Zone 2/22: rare gas/dust explosion atmosphere
Weitere Sonderausführungen
Other special designs
- Dosing screw conveyor
- Mixing screw conveyor
- Twin screw conveyors
- Plug screw conveyor
Zubehör für Schneckenförderer
Accessories for screw conveyors
Additional accessories for trough chain conveyors include:
- Accumulation flap with sensor:
As overflow protection on the drive head - Speed monitoring: On the tensioning shaft
- Supports and chutes
- Shut-off slide
Data sheet for screw conveyors
Our data sheet contain comprehensive information on conveyor capacities, dimensions and many other details:
Conclusion
Thanks to their robust design, low maintenance requirements and wide range of customisation options, screw conveyors offer an ideal solution for material transport in various industries.
With the right components and designs, they can be tailored to specific requirements, making them an indispensable element in conveyor technology.
- Sonnenblumenkerne
- Sojabohne
- Rapssaat
- Flocken
- Presskuchen
- Schrot
- Pulver
- Sonnenblumenkerne
- Sojabohne
- Rapssaat
- Flocken
- Presskuchen
- Schrot
- Pulver
FAQ - Frequently Asked Questions: Screw Conveyors
What are the operational advantages of ILCHMANN screw conveyors?
What are the operational advantages of ILCHMANN screw conveyors?
ILCHMANN screw conveyors are designed for low-maintenance operation under demanding process conditions. The robust construction allows reliable conveying of abrasive, temperature-sensitive, or dust-generating bulk materials.
The fully enclosed design prevents dust emissions and protects both the product and the surrounding environment. At the same time, the conveying process remains stable and gentle. Screw conveyors are therefore well suited for 24/7 operating plants requiring high availability and process reliability.
What capacities and sizes can be achieved?
What capacities and sizes can be achieved?
ILCHMANN screw conveyors are engineered on a project-specific basis and adapted to the conveyed material, process requirements, and plant layout. Depending on bulk density, conveying distance, and geometry, capacities of up to approx. 500 t/h or 1000 m³/h can be achieved.
Screw diameters of up to 1250 mm are available. Conveying speed and design parameters are selected to ensure consistent and reliable material transport.
Trough screw conveyor (TSF) or tubular screw conveyor (RSF) – which design is suitable?
Trough screw conveyor (TSF) or tubular screw conveyor (RSF) – which design is suitable?
The selection depends on routing, sealing requirements, and inclination:
- Trough screw conveyor (TSF): suitable for horizontal or slightly inclined conveying up to approx. 20°. Provides good accessibility and simplified maintenance.
- Pipe screw conveyor (RSF): fully enclosed design, suitable for dust-critical applications and inclined transportations.
The final selection is always based on the specific process requirements.
How is wear reduced when conveying abrasive bulk materials?
How is wear reduced when conveying abrasive bulk materials?
For abrasive materials, the design is adapted specifically to the wear characteristics. In addition to standard and stainless steels, wear-resistant materials and linings such as HARDOX or HDPE are used.
Geometry, wall thickness, and conveying speed are selected to minimize mechanical stress. This approach increases service life and reduces operating costs in terms of total cost of ownership.
Are screw conveyors suitable for operation in ATEX zones?
Are screw conveyors suitable for operation in ATEX zones?
ILCHMANN screw conveyors can be designed for use in potentially explosive atmospheres. The design considers ATEX requirements as well as product-specific properties such as dust behaviour and ignition risks.
Executions for zones 0/20, 1/21, and 2/22 are available. Typical applications include oilseed processing, particularly in extraction and downstream processing sections.
Which additional process functions can be integrated?
Which additional process functions can be integrated?
In addition to conveying, screw conveyors can perform further process functions. Depending on the design, the following applications can be implemented:
- dosing screws for consistent and controlled material discharge
- mixing screws for homogenization during conveying
- plug screws or twin-screw configurations for dense or difficult-to-handle materials
This allows compact plant layouts and reduces the need for additional equipment.